There are a lot of cool mobile device accessories you could put on your Christmas shopping list and one of them should probably be RF Laserworks’ heat sensitive backing for the iPhone. It’s self adhesive so you just slap it on to the back of your iPhone 4 or 4S and then watch your mobile change color depending on the temperature of the surface it comes in contact with. That would most frequently be either your hand or your pocket.

When the backing is black in color that means it’s still cold. Then it moves up from red, yellow, green, and finally to deep blue as the temperature rises. The material used is sensitive to within 90-95 degrees Fahrenheit. It’s also only .005 inches thick, which means it will fit nicely under any other protective wrapping you put on your Apple phone. Remember those mood rings back in the latter part of the 1970’s? Well you can basically turn your iPhone into one with this sort of backing.

Via RF Laserworks